HTC lowered its guidance after missing analysts' expectations and reporting a 27 percent drop in revenues and a 57 percent drop in operating profits. The company's slide is being blamed on increasing difficult competition in the smartphone arena.

A Miami district court judge on Tuesday granted HTC's request to sever Apple's claims against the Taiwanese smartphone maker from an ongoing Motorola Mobility v. Apple case and move the suit to a Delaware court.

It was reported on Tuesday that HTC is bringing counterclaims against Apple over two HP patents the Taiwanese smartphone maker recently acquired to help fight its legal battle with the Cupertino tech giant.

While Apple's competitor Samsung expects to see record profit from the June quarter, rival HTC is struggling in the face of disappointing sales in Europe and an Apple injunction that delayed the launch of new handsets in the U.S.

On the heels of a legal victory in the U.S., HTC also won a court decision in the U.K. on Wednesday, where a judge ruled that HTC's devices do not infringe on four Apple patents related to touchscreen technology.

The U.S International Trade Commission refused Apple's request for an emergency customs ban on HTC Android devices, but the agency is looking into whether redesigned phones from the Taiwanese handset maker still constitute infringement of Apple's "data detectors" patent.

Taiwanese handset maker HTC on Friday announced that it would be pulling out of the Brazilian market entirely amid poor performance that has resulted in a plummeting share of the global smartphone market.

Apple on Thursday filed suit against HTC over alleged infringement of certain standard-essential 4G LTE patents as part of an ongoing U.S. International Trade Commission case involving the two companies.